Home / 39,286.19-54,213.90-21,380.81

Finding the Fourth Proportional to 39,286.19, 54,213.90 and 21,380.81

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Solution

The fourth proportional to 39,286.19, 54,213.90 and 21,380.81 is: 29,504.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,286.19 : 54,213.90 = 21,380.81 : x
  2. Step 2: Convert to fraction form
    39,286.19/54,213.90 = 21,380.81/x
  3. Step 3: Cross multiply
    39,286.19x = 54,213.90 × 21,380.81
  4. Step 4: Simplify right side
    39,286.19x = 1,159,137,095.26
  5. Step 5: Solve for x
    x = 1,159,137,095.26/39,286.19
  6. Step 6: Final answer
    x = 29,504.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.